Reassembling a Casio CZ 101 after repair

I bought a "for parts" Casio CZ-101 and hoped for an easy fix. It wasn't. Luckily someone reacted to my classifieds ad with a request for a new main PCB. Then I swapped the main board and got sound. But things were not that easy. The screen was missing lots of lines and pixels. And 3 buttons and 6 keys weren't working: it turned out a PCB trace was broken, and that 2 wires in the flat cables were broken. And off course I did a thorough cleaning. But finally I got everyting to work, and I managed to install a nice new perfect fit OLED display in a nice yellow colour matching the print on the case. The result: a near mint working Casio CZ. This awesome sounding synth deserves to be preserved and repaired! Don't bring them to recycling but fix it or share parts to others trying to keep their CZ synts alive! This video is a quick montage, I left out the full transcription I usually make because of the length of the video. If you want to see all the details, watch on a big screen, I recorded 4K to grab all details. Link to the screen upgrade video:    • Casio CZ-101 synthesizer OLED display retr...   Screw guide: 2 tiny screws 6 short screws 59 medium screws 11 long screws 2 medium screws with ring Step 1 First step mount screen rack with screen 2 tiny screws, 4 short screws Step 2 board M4152-CN1M (patch select) 7 medium screws Step 3 cartridge connector 3 medium screws Step 4 board M4152-CN2M (sound edit) part 1 (shielded part) Add shield 6 medium screws through shield, leave 1 open for ground cable Step 5 board M4152-CN4 (master tune) 2 medium screws Step 6 board M4152-CN2M part 2 (unshielded part) 4 medium screws, one is under a flat-cable. Plug in screen cable connector at this point Step 7 board M4152-CN5 (power button) 2 medium screws Step 8 board (key-bed contacts) 12 medium screws, leave 1 open for ground cable. Test functioning now Step 9 M4152-CN3M (volume slider) 2 medium screws Step 10 M4152-MA3M (input matrix latch/transistor array board) 4 medium screws Now you connect ground wire to all remaining spots but pitch-wheel 3 medium screws Step 11 M4152-MA2M (output and power board) 5 medium screws Step 12 Pitch bend wheel 2 medium screws with ring (including connecting final ground wire loop) Step 13 M4152-MA1M (main synth board) 7 medium screws Solder red and black wire Step 14 Close the case 11 long screws 2 medium screws in battery compartment.